Wrench



March 28, R. SANDOZ WRENCH Fired-'May 1e, 1932 s sheets-sheet 1 EX Inventar y 12202297; andaz,

By @Maa/ih MalCh 28, 1933. l Rv SANDOZ WRENCH Filed May 16, 1932 3 Sheets-Sheet 2 Inventor 02362; azdaz,

Home y March 2s, 1933. R. S'ANDOZ 1,903,270

WRENCH Filed May 1s, i952 3 sheets-sheet s A Blwaorh Inuenlor f1 Home y Patented Mar. 28, 19331 UNITED STATES ROLLER' SANDOZ, OF THE DALLES, OREGON WRENCH Application filed Mayv 16,

This invention relates to wrenches, and in accordance with the present invention a wrench is provided which will positively grip the nut or similar workin such a manner as to preclude slipping of the wrench relative to the nut or work, which slippage, especially when the wrench is applied to a nut, results in a disflguring of the nut which is objectionable for reasons ,Well known The invention has particular reference to those types of wrenches wherein a pair of coacting jawsare provided which, when the handle is forced in one direction will automatically grip the work or nut, and the invention will be best understood-from a study of the following description, taken in connection with the accompanying drawings where- 1n:

Figure 1 is a side elevational view of the wrench.

Figure 2 is a rear end elevational view.

Figure 3 is a perspective view of a spring.

Figure 4 is a perspective view of a link.

Figure 5 is a longitudinal sectional view, partly in elevation through the wrench.

Figure 6 is an elevational view of a pin.

Figure 7 is a perspective view of a frame or body portion of the wrench.

Figure 8 is a side elevational view of a slightly modified form of wrench.

Figure 9 is a perspective view of an end portion of a handle or lever of the type employed in that form of the invention shown in Figure 8.

Figure 10 is a perspective view of a modified form of frame or body member, and

Figure 11 is a perspective view of a reinforcing plate.

Reference being had more particularly to Figures 1 to 7 inclusive, 5 designates a main frame or body comprising sides 6 and an end wall or web 7, the body 5 being substantially U-shaped in cross section as will be apparent from a study of Figure 7. The body 5 is also provided with a lateral notch 8 opening at both the sides 6 and end wall 7.

The side 6 of body 5 at the upper end of the body are connected by a relatively .short web 9 constituting a jaw.

A jaw 11 is provided with a shank 12 1932, Serial No. 611,731.

constrained to slide longitudinally in the body 5 between the sides 6. The web or jaw constituting member 9, together with a connecting web 13 coacts with the wall 7 for constraining the shank 12 to slide lengthwise of the body 5; and it will be noted that the web 13 is in substantial vertical alinement with the inner end of the jaw constituting web 9.

An auxiliary frame or body member designated generally as a Whole by the reference character 14 is provided, and the same is substantially U-shaped in cross section and receives between the sides 15 thereof the shank 12. The said sides 15 of frame or body member 14 adjacent the open side of the U is notched as at 16; and said sides 15 above and below the notches 16 are connected by webs or solid portions forming upper and lower bearing lugs 18, 19 (Figure 5) and these lugs are apertured for accommodating the ends of a worm supporting pin 20.

Rotatably supported on the pin 20 between the lugs 18, 19 is a worm 21 meshing with teeth 12a 12. It will be evident that (with the parts assembled as shown in the drawings, body or auxiliary frame member 14 being disposed on the shank 12 within the notch 8 of the body or frame member 5), upon rotation of the worm 21 shank 12 will be shifted longitudinally in one direction or the other whereby an adjustment of the jaws 9 and 11 relative to one another is easily effected.

A handle 22 is provided with a yhead 22a which in this form of the invention is provided with, adjacent its free end, an aperture adapted to register with coinciding apertures 23 provided on the sides 6 of the frame or body 5 for receiving a pivot pin 24. One longitudinal edge portion of the head 22a is notched as at 25 to accommodate the worm 21 and the upper portion of the notch is restricted as shown in Figure 5. The upper restricted end portion of the notch 25 forms a shoulder 26 having a concaved face normally alined with a concaved recess 18a provided in the upper face of the lug 18. A link 27 has rounded or convexed ends, and -one -of these ends engages the shoulder 26 while the provided on one edge of the shank other of said ends engages in the recess 18a as shown in Figure 5.

From the description of the invention thus far, it will be apparent that when the jaws 9, 11 have been properly adjusted by means of the worm 21, rotative movement of the handle 22 in an anti-clockwise direction will through the link 27 exert a downward pressure on the auxiliary frame or body member 14 causing a downward movement of the shank 12 and j aw 11 so that jaw 1l, by reason of its movement toward aw 9, will together with jaw 9 grip the nut or other work thus insuring a positive gripping engagement of the jaws with the work and thereby prevent slipping of the wrench while turning the work or nut.

Main body or member 5 and auxiliary body or frame member 14 are normally urged in relatively opposite directions through the l medium of a spring device 28, which latter is in the nature of a leaf spring, one end 28a of which is bolted or otherwise secured to the web portion of the auxiliary body or frame member 14 adjacent the lower end of said member while the free end portion of the spring 28 is bifurcated to provide a pair of spring arms 29 which straddle the shank 12 and have bearing engagement with the sides 6 of the main body 5 at the bottom of the slot or notch 8, so that as is evident, spring 28 provides for an expanding pressure between the members 14 and 5. Manifest-ly spring 28 will act on-the member 14 oppositely to the pressure exerted thereon by rotating the handle 22 in an anti-clockwise direction, and will accordingly upon return of the handle 22 to its normal position, that is the position shown in the drawings, act on the member 14 and shank 12 to shift the same outwardly, moving jaw 11 away from aw 9 and thereby lessening the gripping action of the jaw members 9 and 11 on the work; and this gripping action being se lessened screw 21 may be readily rotated for shifting the shank 12 longitudinally in the proper direction to further separate the jaws 9'and 11 prior to a removal of the wrench from the work.

rlhe form of the invention shown in Figures 8 to 10 inclusive, differs from that shcwn in Figures 1 to 7 inclusive and above described in detail, in the following manner; first, instead of using a pivot pin 24, and providing apertures 23, and an aperture in the head of the handle said head is provided on relatively opposite sides thereof with relatively short lateral pins 80, and the sides of the main body member are provided Vith slots 31 opening into the notch 8. rhus as shown in Figure 8 when the head of the handle member is placed between the sides of the main body or frame, pins 30 are introduced into the notches 31 and engage the inner end of the notches to provide a fulcrum for the handle: And secondly the notch 8 of the body member is closed through the medium of a reinforcing plate 32 the ends of which are bolted or otherwise secured to the main body or frame above and below the notch, and at said ends are engaged with fixed shoulders 33 (see Figure 8).

The type of wrench shown in Figures 8 to 11 inclusive will be found to be stronger than the first described form of the invention, and accordingly this modified form of the invention is intended for more heavy work, the connection between the handle and main body or frame member being capable of withstanding greater strain than the pivotal connection between the handle and main frame or body member in that form of the invention disclosed in Figures 1 to 7 inclusive.

Even though I have herein shown and described the preferred embodiments of the invention, it is to be understood that the same is susceptible of further changes coming within the scope of the appended claims.

Having thus described my invention, what I claim as new is:

1. A wrench comprising a main hollow body provided with a jaw, a jaw complementing the lirst named aw and provided with a shank extending through said body an auxiliary hollow body surrounding the shank and working in an opening formed in the main body, and also provided with longitudinally spaced alined bearing lugs; a worm, a supporting pin for the worm journalled in the bearing lugs; teeth on said shank and with which the worm is engaged g a spring mounted on the auxiliary body member and having a bifurcated end straddling said shank and bearing against an adjacent part of said main body; a handle having a head pivoted within the main body and provided with a shoulder normally alined with the bearing lugs, and a link interposed between said shoulder and an adjacent one of said bearing lugs.

2. A wrench comprising a main body and an auxiliary body, each being hollow and substantially rectangular in cross section; the main body having openings in opposite sides thereof, and the auxiliary body having sides thereof complemental to the said sides of the main body working in said openings; a shank extending through said main and auxiliarv bodies and having a jaw at one end, teeth on said shank, a worm rotatably mounted on the auxiliary body and engaging said teeth, a handle member having an end pvotally mounted within the main body and provided at said pivoted end with a projecting shoulder normally alined with said worm; and a link, normally alined with said worm and interposed between said shoulder and a proximate end of the auxiliary body; and means engaging the main and auxiliary bodies and yieldably urging the same to shift in opposite directions relative to one another.

In testimony whereof I aliix my signature.

ROLLEN SANDOZ. 

